Zynga, the company behind Facebook titles like Farmville and Mafia Wars, is in trouble with the San Francisco City Attorney's Office over reports of vandalism linked to the developer's advertisements.

San Fran Deputy City Attorney Alex Tse accuses the social game devs of several "documented acts of sidewalk vandalism" in relation to ads for the upcoming Mafia Wars: Las Vegas, in which fake bank notes have been glued to the city's streets.